package com.ym.wcp.framework.utils;

import org.apache.commons.codec.binary.Base64;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.math.BigInteger;
import java.nio.charset.StandardCharsets;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class SM4Utils {

    private static final String SECRET_KEY = "GJwsXX_BzW=gJWJW";
    private static final String IV = "ZkR_SiNoSOFT=568";
    private static final boolean HEX_STRING = false;
    private static final Pattern P = Pattern.compile("\\s*|\t|\r|\n");

    private SM4Utils() {
    }

    public static String encryptData_ECB(String plainText, String secretKey) {
        try {
            SM4_Context ctx = new SM4_Context();
            ctx.isPadding = true;
            ctx.mode = 1;
            byte[] keyBytes = secretKey.getBytes();
            SM4 sm4 = new SM4();
            sm4.sm4_setkey_enc(ctx, keyBytes);
            byte[] encrypted = sm4.sm4_crypt_ecb(ctx, plainText.getBytes(StandardCharsets.UTF_8));
            String cipherText = Base64.encodeBase64String(encrypted);
            if (cipherText != null && cipherText.trim().length() > 0) {
                Matcher m = P.matcher(cipherText);
                cipherText = m.replaceAll("");
            }
            return cipherText;
        } catch (Exception var8) {
            var8.printStackTrace();
            return null;
        }
    }

    public static String encryptData_ECB(String plainText) {
        try {
            SM4_Context ctx = new SM4_Context();
            ctx.isPadding = true;
            ctx.mode = 1;
            byte[] keyBytes = "GJwsXX_BzW=gJWJW".getBytes();
            SM4 sm4 = new SM4();
            sm4.sm4_setkey_enc(ctx, keyBytes);
            byte[] encrypted = sm4.sm4_crypt_ecb(ctx, plainText.getBytes(StandardCharsets.UTF_8));
            String cipherText = Base64.encodeBase64String(encrypted);
            if (cipherText != null && cipherText.trim().length() > 0) {
                Matcher m = P.matcher(cipherText);
                cipherText = m.replaceAll("");
            }

            return cipherText;
        } catch (Exception var7) {
            var7.printStackTrace();
            return null;
        }
    }

    public static String decryptData_ECB(String cipherText, String secretKey) {
        try {
            SM4_Context ctx = new SM4_Context();
            ctx.isPadding = true;
            ctx.mode = 0;
            byte[] keyBytes = secretKey.getBytes();
            SM4 sm4 = new SM4();
            sm4.sm4_setkey_dec(ctx, keyBytes);
            byte[] decrypted = sm4.sm4_crypt_ecb(ctx, Base64.decodeBase64(cipherText));
            return new String(decrypted, StandardCharsets.UTF_8);
        } catch (Exception var6) {
            var6.printStackTrace();
            return null;
        }
    }

    public static String decryptData_ECB(String cipherText) {
        try {
            SM4_Context ctx = new SM4_Context();
            ctx.isPadding = true;
            ctx.mode = 0;
            byte[] keyBytes = "GJwsXX_BzW=gJWJW".getBytes();
            SM4 sm4 = new SM4();
            sm4.sm4_setkey_dec(ctx, keyBytes);
            byte[] decrypted = sm4.sm4_crypt_ecb(ctx, Base64.decodeBase64(cipherText));
            return new String(decrypted, StandardCharsets.UTF_8);
        } catch (Exception var5) {
            var5.printStackTrace();
            return null;
        }
    }

    public static String encryptData_CBC(String plainText, String secretKey, String iv) {
        try {
            SM4_Context ctx = new SM4_Context();
            ctx.isPadding = true;
            ctx.mode = 1;
            byte[] keyBytes = secretKey.getBytes();
            byte[] ivBytes = iv.getBytes();
            SM4 sm4 = new SM4();
            sm4.sm4_setkey_enc(ctx, keyBytes);
            byte[] encrypted = sm4.sm4_crypt_cbc(ctx, ivBytes, plainText.getBytes(StandardCharsets.UTF_8));
            String cipherText = Base64.encodeBase64String(encrypted);
            if (cipherText != null && cipherText.trim().length() > 0) {
                Matcher m = P.matcher(cipherText);
                cipherText = m.replaceAll("");
            }

            return cipherText;
        } catch (Exception var10) {
            var10.printStackTrace();
            return null;
        }
    }

    public static String encryptData_CBC(String plainText) {
        try {
            SM4_Context ctx = new SM4_Context();
            ctx.isPadding = true;
            ctx.mode = 1;
            byte[] keyBytes = "GJwsXX_BzW=gJWJW".getBytes();
            byte[] ivBytes = "ZkR_SiNoSOFT=568".getBytes();
            SM4 sm4 = new SM4();
            sm4.sm4_setkey_enc(ctx, keyBytes);
            byte[] encrypted = sm4.sm4_crypt_cbc(ctx, ivBytes, plainText.getBytes(StandardCharsets.UTF_8));
            String cipherText = Base64.encodeBase64String(encrypted);
            if (cipherText != null && cipherText.trim().length() > 0) {
                Matcher m = P.matcher(cipherText);
                cipherText = m.replaceAll("");
            }

            return cipherText;
        } catch (Exception var8) {
            var8.printStackTrace();
            return null;
        }
    }

    public static String decryptData_CBC(String cipherText, String secretKey, String iv) {
        try {
            SM4_Context ctx = new SM4_Context();
            ctx.isPadding = true;
            ctx.mode = 0;
            byte[] keyBytes = secretKey.getBytes();
            byte[] ivBytes = iv.getBytes();
            SM4 sm4 = new SM4();
            sm4.sm4_setkey_dec(ctx, keyBytes);
            byte[] decrypted = sm4.sm4_crypt_cbc(ctx, ivBytes, Base64.decodeBase64(cipherText));
            return new String(decrypted, StandardCharsets.UTF_8);
        } catch (Exception var8) {
            var8.printStackTrace();
            return null;
        }
    }

    public static String decryptData_CBC(String cipherText) {
        try {
            SM4_Context ctx = new SM4_Context();
            ctx.isPadding = true;
            ctx.mode = 0;
            byte[] keyBytes = "GJwsXX_BzW=gJWJW".getBytes();
            byte[] ivBytes = "ZkR_SiNoSOFT=568".getBytes();
            SM4 sm4 = new SM4();
            sm4.sm4_setkey_dec(ctx, keyBytes);
            byte[] decrypted = sm4.sm4_crypt_cbc(ctx, ivBytes, Base64.decodeBase64(cipherText));
            return new String(decrypted, StandardCharsets.UTF_8);
        } catch (Exception var6) {
            var6.printStackTrace();
            return null;
        }
    }

    private static class SM4_Context {
        public int mode;

        public int[] sk;

        public boolean isPadding;

        public SM4_Context() {
            this.mode = 1;
            this.isPadding = true;
            this.sk = new int[32];
        }
    }

    private static class SM4 {
        private static final Logger logger = LoggerFactory.getLogger(SM4.class);
        public static final int SM4_ENCRYPT = 1;
        public static final int SM4_DECRYPT = 0;

        private int GET_ULONG_BE(byte[] b, int i) {
            return (b[i] & 0xff) << 24 | ((b[i + 1] & 0xff) << 16) | ((b[i + 2] & 0xff) << 8)
                    | b[i + 3] & 0xff & 0xffffffff;
        }

        private void PUT_ULONG_BE(int n, byte[] b, int i) {
            b[i] = (byte) (0xFF & n >> 24);
            b[i + 1] = (byte) (0xFF & n >> 16);
            b[i + 2] = (byte) (0xFF & n >> 8);
            b[i + 3] = (byte) (0xFF & n);
        }

        private int SHL(int x, int n) {
            return (x & 0xFFFFFFFF) << n;
        }

        private int ROTL(int x, int n) {
            return SHL(x, n) | x >> (32 - n);
        }

        public static final byte[] SBOX_TABLE = {(byte) 0xd6, (byte) 0x90, (byte) 0xe9, (byte) 0xfe, (byte) 0xcc,
                (byte) 0xe1, 0x3d, (byte) 0xb7, 0x16, (byte) 0xb6, 0x14, (byte) 0xc2, 0x28, (byte) 0xfb, 0x2c, 0x05, 0x2b,
                0x67, (byte) 0x9a, 0x76, 0x2a, (byte) 0xbe, 0x04, (byte) 0xc3, (byte) 0xaa, 0x44, 0x13, 0x26, 0x49,
                (byte) 0x86, 0x06, (byte) 0x99, (byte) 0x9c, 0x42, 0x50, (byte) 0xf4, (byte) 0x91, (byte) 0xef, (byte) 0x98,
                0x7a, 0x33, 0x54, 0x0b, 0x43, (byte) 0xed, (byte) 0xcf, (byte) 0xac, 0x62, (byte) 0xe4, (byte) 0xb3, 0x1c,
                (byte) 0xa9, (byte) 0xc9, 0x08, (byte) 0xe8, (byte) 0x95, (byte) 0x80, (byte) 0xdf, (byte) 0x94,
                (byte) 0xfa, 0x75, (byte) 0x8f, 0x3f, (byte) 0xa6, 0x47, 0x07, (byte) 0xa7, (byte) 0xfc, (byte) 0xf3, 0x73,
                0x17, (byte) 0xba, (byte) 0x83, 0x59, 0x3c, 0x19, (byte) 0xe6, (byte) 0x85, 0x4f, (byte) 0xa8, 0x68, 0x6b,
                (byte) 0x81, (byte) 0xb2, 0x71, 0x64, (byte) 0xda, (byte) 0x8b, (byte) 0xf8, (byte) 0xeb, 0x0f, 0x4b, 0x70,
                0x56, (byte) 0x9d, 0x35, 0x1e, 0x24, 0x0e, 0x5e, 0x63, 0x58, (byte) 0xd1, (byte) 0xa2, 0x25, 0x22, 0x7c,
                0x3b, 0x01, 0x21, 0x78, (byte) 0x87, (byte) 0xd4, 0x00, 0x46, 0x57, (byte) 0x9f, (byte) 0xd3, 0x27, 0x52,
                0x4c, 0x36, 0x02, (byte) 0xe7, (byte) 0xa0, (byte) 0xc4, (byte) 0xc8, (byte) 0x9e, (byte) 0xea, (byte) 0xbf,
                (byte) 0x8a, (byte) 0xd2, 0x40, (byte) 0xc7, 0x38, (byte) 0xb5, (byte) 0xa3, (byte) 0xf7, (byte) 0xf2,
                (byte) 0xce, (byte) 0xf9, 0x61, 0x15, (byte) 0xa1, (byte) 0xe0, (byte) 0xae, 0x5d, (byte) 0xa4, (byte) 0x9b,
                0x34, 0x1a, 0x55, (byte) 0xad, (byte) 0x93, 0x32, 0x30, (byte) 0xf5, (byte) 0x8c, (byte) 0xb1, (byte) 0xe3,
                0x1d, (byte) 0xf6, (byte) 0xe2, 0x2e, (byte) 0x82, 0x66, (byte) 0xca, 0x60, (byte) 0xc0, 0x29, 0x23,
                (byte) 0xab, 0x0d, 0x53, 0x4e, 0x6f, (byte) 0xd5, (byte) 0xdb, 0x37, 0x45, (byte) 0xde, (byte) 0xfd,
                (byte) 0x8e, 0x2f, 0x03, (byte) 0xff, 0x6a, 0x72, 0x6d, 0x6c, 0x5b, 0x51, (byte) 0x8d, 0x1b, (byte) 0xaf,
                (byte) 0x92, (byte) 0xbb, (byte) 0xdd, (byte) 0xbc, 0x7f, 0x11, (byte) 0xd9, 0x5c, 0x41, 0x1f, 0x10, 0x5a,
                (byte) 0xd8, 0x0a, (byte) 0xc1, 0x31, (byte) 0x88, (byte) 0xa5, (byte) 0xcd, 0x7b, (byte) 0xbd, 0x2d, 0x74,
                (byte) 0xd0, 0x12, (byte) 0xb8, (byte) 0xe5, (byte) 0xb4, (byte) 0xb0, (byte) 0x89, 0x69, (byte) 0x97, 0x4a,
                0x0c, (byte) 0x96, 0x77, 0x7e, 0x65, (byte) 0xb9, (byte) 0xf1, 0x09, (byte) 0xc5, 0x6e, (byte) 0xc6,
                (byte) 0x84, 0x18, (byte) 0xf0, 0x7d, (byte) 0xec, 0x3a, (byte) 0xdc, 0x4d, 0x20, 0x79, (byte) 0xee, 0x5f,
                0x3e, (byte) 0xd7, (byte) 0xcb, 0x39, 0x48};

        public static final int[] FK = {0xa3b1bac6, 0x56aa3350, 0x677d9197, 0xb27022dc};

        public static final int[] CK = {0x00070e15, 0x1c232a31, 0x383f464d, 0x545b6269, 0x70777e85, 0x8c939aa1, 0xa8afb6bd,
                0xc4cbd2d9, 0xe0e7eef5, 0xfc030a11, 0x181f262d, 0x343b4249, 0x50575e65, 0x6c737a81, 0x888f969d, 0xa4abb2b9,
                0xc0c7ced5, 0xdce3eaf1, 0xf8ff060d, 0x141b2229, 0x30373e45, 0x4c535a61, 0x686f767d, 0x848b9299, 0xa0a7aeb5,
                0xbcc3cad1, 0xd8dfe6ed, 0xf4fb0209, 0x10171e25, 0x2c333a41, 0x484f565d, 0x646b7279};

        private byte sm4Sbox(byte inch) {
            int i = inch & 0xFF;
            byte retVal = SBOX_TABLE[i];
            return retVal;
        }

        private int sm4Lt(int ka) {
            int bb;
            int c;
            byte[] a = new byte[4];
            byte[] b = new byte[4];
            PUT_ULONG_BE(ka, a, 0);
            b[0] = sm4Sbox(a[0]);
            b[1] = sm4Sbox(a[1]);
            b[2] = sm4Sbox(a[2]);
            b[3] = sm4Sbox(a[3]);
            bb = GET_ULONG_BE(b, 0);
            c = bb ^ ROTL(bb, 2) ^ ROTL(bb, 10) ^ ROTL(bb, 18) ^ ROTL(bb, 24);
            return c;
        }

        private int sm4F(int x0, int x1, int x2, int x3, int rk) {
            return x0 ^ sm4Lt(x1 ^ x2 ^ x3 ^ rk);
        }

        private int sm4CalciRK(int ka) {
            int bb;
            int rk;
            byte[] a = new byte[4];
            byte[] b = new byte[4];
            PUT_ULONG_BE(ka, a, 0);
            b[0] = sm4Sbox(a[0]);
            b[1] = sm4Sbox(a[1]);
            b[2] = sm4Sbox(a[2]);
            b[3] = sm4Sbox(a[3]);
            bb = GET_ULONG_BE(b, 0);
            rk = bb ^ ROTL(bb, 13) ^ ROTL(bb, 23);
            return rk;
        }

        private void sm4_setkey(int[] SK, byte[] key) {
            int[] mK = new int[4];
            int[] k = new int[36];
            int i = 0;
            mK[0] = GET_ULONG_BE(key, 0);
            mK[1] = GET_ULONG_BE(key, 4);
            mK[2] = GET_ULONG_BE(key, 8);
            mK[3] = GET_ULONG_BE(key, 12);
            k[0] = mK[0] ^ FK[0];
            k[1] = mK[1] ^ FK[1];
            k[2] = mK[2] ^ FK[2];
            k[3] = mK[3] ^ FK[3];
            for (; i < 32; i++) {
                k[(i + 4)] = (k[i] ^ sm4CalciRK(k[(i + 1)] ^ k[(i + 2)] ^ k[(i + 3)] ^ (int) CK[i]));
                SK[i] = k[(i + 4)];
            }
        }

        private void sm4_one_round(int[] sk, byte[] input, byte[] output) {
            int i = 0;
            int[] ulbuf = new int[36];
            ulbuf[0] = GET_ULONG_BE(input, 0);
            ulbuf[1] = GET_ULONG_BE(input, 4);
            ulbuf[2] = GET_ULONG_BE(input, 8);
            ulbuf[3] = GET_ULONG_BE(input, 12);
            while (i < 32) {
                ulbuf[(i + 4)] = sm4F(ulbuf[i], ulbuf[(i + 1)], ulbuf[(i + 2)], ulbuf[(i + 3)], sk[i]);
                i++;
            }
            PUT_ULONG_BE(ulbuf[35], output, 0);
            PUT_ULONG_BE(ulbuf[34], output, 4);
            PUT_ULONG_BE(ulbuf[33], output, 8);
            PUT_ULONG_BE(ulbuf[32], output, 12);
        }

        private byte[] padding(byte[] input, int mode) {
            byte[] ret;
            if (mode == SM4_ENCRYPT) {
                int p = 16 - input.length % 16;
                ret = new byte[input.length + p];
                System.arraycopy(input, 0, ret, 0, input.length);
                for (int i = 0; i < p; i++) {
                    ret[input.length + i] = (byte) p;
                }
            } else {
                int p = input[input.length - 1];
                ret = new byte[input.length - p];
                System.arraycopy(input, 0, ret, 0, input.length - p);
            }
            return ret;
        }

        public void sm4_setkey_enc(SM4_Context ctx, byte[] key) throws Exception {
            if (ctx == null) {
                logger.error("ctx is null");
                throw new Exception("ctx is null!");
            }

            if (key == null || key.length != 16) {
                logger.error("secretKey必须为 16 位，可包含字母、数字、标点");
                throw new Exception("secretKey必须为 16 位，可包含字母、数字、标点");
            }

            ctx.mode = SM4_ENCRYPT;
            sm4_setkey(ctx.sk, key);
        }

        public byte[] sm4_crypt_ecb(SM4_Context ctx, byte[] input) throws Exception {
            if (input == null) {
                logger.error("要加解密的数据为null");
                throw new Exception("要加解密的数据为null");
            }

            if ((ctx.isPadding) && (ctx.mode == SM4_ENCRYPT)) {
                input = padding(input, SM4_ENCRYPT);
            }

            int length = input.length;
            ByteArrayInputStream bins = new ByteArrayInputStream(input);
            ByteArrayOutputStream bous = new ByteArrayOutputStream();
            for (; length > 0; length -= 16) {
                byte[] in = new byte[16];
                byte[] out = new byte[16];
                bins.read(in);
                sm4_one_round(ctx.sk, in, out);
                bous.write(out);
            }

            byte[] output = bous.toByteArray();
            if (ctx.isPadding && ctx.mode == SM4_DECRYPT) {
                output = padding(output, SM4_DECRYPT);
            }
            bins.close();
            bous.close();
            return output;
        }

        public void sm4_setkey_dec(SM4_Context ctx, byte[] key) throws Exception {
            if (ctx == null) {
                logger.error("ctx is null!");
                throw new Exception("ctx is null!");
            }

            if (key == null || key.length != 16) {
                logger.error("secretKey必须为 16 位，可包含字母、数字、标点");
                throw new Exception("secretKey必须为 16 位，可包含字母、数字、标点");
            }

            int i = 0;
            ctx.mode = SM4_DECRYPT;
            sm4_setkey(ctx.sk, key);
            for (i = 0; i < 16; i++) {
                SWAP(ctx.sk, i);
            }
        }

        private void SWAP(int[] sk, int i) {
            int t = sk[i];
            sk[i] = sk[(31 - i)];
            sk[(31 - i)] = t;
        }

        public byte[] sm4_crypt_cbc(SM4_Context ctx, byte[] iv, byte[] input) throws Exception {
            if (iv == null || iv.length != 16) {
                logger.error("iv必须为 16 位，可包含字母、数字、标点");
                throw new Exception("iv必须为 16 位，可包含字母、数字、标点");
            }

            if (input == null) {
                logger.error("要加解密的数据为null");
                throw new Exception("要加解密的数据为null");
            }

            if (ctx.isPadding && ctx.mode == SM4_ENCRYPT) {
                input = padding(input, SM4_ENCRYPT);
            }
            int i;
            int length = input.length;
            ByteArrayInputStream bins = new ByteArrayInputStream(input);
            ByteArrayOutputStream bous = new ByteArrayOutputStream();
            if (ctx.mode == SM4_ENCRYPT) {
                for (; length > 0; length -= 16) {
                    byte[] in = new byte[16];
                    byte[] out = new byte[16];
                    byte[] out1 = new byte[16];

                    bins.read(in);
                    for (i = 0; i < 16; i++) {
                        out[i] = ((byte) (in[i] ^ iv[i]));
                    }
                    sm4_one_round(ctx.sk, out, out1);
                    System.arraycopy(out1, 0, iv, 0, 16);
                    bous.write(out1);
                }
            } else {
                byte[] temp = new byte[16];
                for (; length > 0; length -= 16) {
                    byte[] in = new byte[16];
                    byte[] out = new byte[16];
                    byte[] out1 = new byte[16];

                    bins.read(in);
                    System.arraycopy(in, 0, temp, 0, 16);
                    sm4_one_round(ctx.sk, in, out);
                    for (i = 0; i < 16; i++) {
                        out1[i] = ((byte) (out[i] ^ iv[i]));
                    }
                    System.arraycopy(temp, 0, iv, 0, 16);
                    bous.write(out1);
                }
            }

            byte[] output = bous.toByteArray();
            if (ctx.isPadding && ctx.mode == SM4_DECRYPT) {
                output = padding(output, SM4_DECRYPT);
            }
            bins.close();
            bous.close();
            return output;
        }
    }

    private static class Util {

        /**
         * 整形转换成网络传输的字节流（字节数组）型数据
         *
         * @param num 一个整型数据
         * @return 4个字节的自己数组
         */
        public static byte[] intToBytes(int num) {
            byte[] bytes = new byte[4];
            bytes[0] = (byte) (0xff & (num >> 0));
            bytes[1] = (byte) (0xff & (num >> 8));
            bytes[2] = (byte) (0xff & (num >> 16));
            bytes[3] = (byte) (0xff & (num >> 24));
            return bytes;
        }

        /**
         * 四个字节的字节数据转换成一个整形数据
         *
         * @param bytes 4个字节的字节数组
         * @return 一个整型数据
         */
        public static int byteToInt(byte[] bytes) {
            int num = 0;
            int temp;
            temp = (0x000000ff & (bytes[0])) << 0;
            num = num | temp;
            temp = (0x000000ff & (bytes[1])) << 8;
            num = num | temp;
            temp = (0x000000ff & (bytes[2])) << 16;
            num = num | temp;
            temp = (0x000000ff & (bytes[3])) << 24;
            num = num | temp;
            return num;
        }

        /**
         * 长整形转换成网络传输的字节流（字节数组）型数据
         *
         * @param num 一个长整型数据
         * @return 4个字节的自己数组
         */
        public static byte[] longToBytes(long num) {
            byte[] bytes = new byte[8];
            for (int i = 0; i < 8; i++) {
                bytes[i] = (byte) (0xff & (num >> (i * 8)));
            }
            return bytes;
        }

        /**
         * 大数字转换字节流（字节数组）型数据
         *
         * @param n
         * @return
         */
        public static byte[] byteConvert32Bytes(BigInteger n) {
            byte[] tmp;
            if (n == null) {
                return null;
            }

            if (n.toByteArray().length == 33) {
                tmp = new byte[32];
                System.arraycopy(n.toByteArray(), 1, tmp, 0, 32);
            } else if (n.toByteArray().length == 32) {
                tmp = n.toByteArray();
            } else {
                tmp = new byte[32];
                for (int i = 0; i < 32 - n.toByteArray().length; i++) {
                    tmp[i] = 0;
                }
                System.arraycopy(n.toByteArray(), 0, tmp, 32 - n.toByteArray().length, n.toByteArray().length);
            }
            return tmp;
        }

        /**
         * 换字节流（字节数组）型数据转大数字
         *
         * @param b
         * @return
         */
        public static BigInteger byteConvertInteger(byte[] b) {
            if (b[0] < 0) {
                byte[] temp = new byte[b.length + 1];
                temp[0] = 0;
                System.arraycopy(b, 0, temp, 1, b.length);
                return new BigInteger(temp);
            }
            return new BigInteger(b);
        }

        /**
         * 根据字节数组获得值(十六进制数字)
         *
         * @param bytes
         * @return
         */
        public static String getHexString(byte[] bytes) {
            return getHexString(bytes, true);
        }

        /**
         * 根据字节数组获得值(十六进制数字)
         *
         * @param bytes
         * @param upperCase
         * @return
         */
        public static String getHexString(byte[] bytes, boolean upperCase) {
            StringBuilder ret = new StringBuilder();
            for (byte aByte : bytes) {
                ret.append(Integer.toString((aByte & 0xff) + 0x100, 16).substring(1));
            }
            return upperCase ? ret.toString().toUpperCase() : ret.toString();
        }

        /**
         * 打印十六进制字符串
         *
         * @param bytes
         */
        public static void printHexString(byte[] bytes) {
            for (byte aByte : bytes) {
                String hex = Integer.toHexString(aByte & 0xFF);
                if (hex.length() == 1) {
                    hex = '0' + hex;
                }
                System.out.print("0x" + hex.toUpperCase() + ",");
            }
        }

        /**
         * Convert hex string to byte[]
         *
         * @param hexString the hex string
         * @return byte[]
         */
        public static byte[] hexStringToBytes(String hexString) {
            if (hexString == null || "".equals(hexString)) {
                return null;
            }
            hexString = hexString.toUpperCase();
            int length = hexString.length() / 2;
            char[] hexChars = hexString.toCharArray();
            byte[] d = new byte[length];
            for (int i = 0; i < length; i++) {
                int pos = i * 2;
                d[i] = (byte) (charToByte(hexChars[pos]) << 4 | charToByte(hexChars[pos + 1]));
            }
            return d;
        }

        /**
         * Convert char to byte
         *
         * @param c char
         * @return byte
         */
        public static byte charToByte(char c) {
            return (byte) "0123456789ABCDEF".indexOf(c);
        }

        /**
         * 用于建立十六进制字符的输出的小写字符数组
         */
        private static final char[] DIGITS_LOWER = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};

        /**
         * 用于建立十六进制字符的输出的大写字符数组
         */
        private static final char[] DIGITS_UPPER = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};

        /**
         * 将字节数组转换为十六进制字符数组
         *
         * @param data byte[]
         * @return 十六进制char[]
         */
        public static char[] encodeHex(byte[] data) {
            return encodeHex(data, true);
        }

        /**
         * 将字节数组转换为十六进制字符数组
         *
         * @param data        byte[]
         * @param toLowerCase <code>true</code> 传换成小写格式 ， <code>false</code> 传换成大写格式
         * @return 十六进制char[]
         */
        public static char[] encodeHex(byte[] data, boolean toLowerCase) {
            return encodeHex(data, toLowerCase ? DIGITS_LOWER : DIGITS_UPPER);
        }

        /**
         * 将字节数组转换为十六进制字符数组
         *
         * @param data     byte[]
         * @param toDigits 用于控制输出的char[]
         * @return 十六进制char[]
         */
        protected static char[] encodeHex(byte[] data, char[] toDigits) {
            int l = data.length;
            char[] out = new char[l << 1];
            // two characters form the hex value.
            for (int i = 0, j = 0; i < l; i++) {
                out[j++] = toDigits[(0xF0 & data[i]) >>> 4];
                out[j++] = toDigits[0x0F & data[i]];
            }
            return out;
        }

        /**
         * 将字节数组转换为十六进制字符串
         *
         * @param data byte[]
         * @return 十六进制String
         */
        public static String encodeHexString(byte[] data) {
            return encodeHexString(data, true);
        }

        /**
         * 将字节数组转换为十六进制字符串
         *
         * @param data        byte[]
         * @param toLowerCase <code>true</code> 传换成小写格式 ， <code>false</code> 传换成大写格式
         * @return 十六进制String
         */
        public static String encodeHexString(byte[] data, boolean toLowerCase) {
            return encodeHexString(data, toLowerCase ? DIGITS_LOWER : DIGITS_UPPER);
        }

        /**
         * 将字节数组转换为十六进制字符串
         *
         * @param data     byte[]
         * @param toDigits 用于控制输出的char[]
         * @return 十六进制String
         */
        protected static String encodeHexString(byte[] data, char[] toDigits) {
            return new String(encodeHex(data, toDigits));
        }

        /**
         * 将十六进制字符数组转换为字节数组
         *
         * @param data 十六进制char[]
         * @return byte[]
         * @throws RuntimeException 如果源十六进制字符数组是一个奇怪的长度，将抛出运行时异常
         */
        public static byte[] decodeHex(char[] data) {
            int len = data.length;
            if ((len & 0x01) != 0) {
                throw new RuntimeException("Odd number of characters.");
            }
            byte[] out = new byte[len >> 1];
            // two characters form the hex value.
            for (int i = 0, j = 0; j < len; i++) {
                int f = toDigit(data[j], j) << 4;
                j++;
                f = f | toDigit(data[j], j);
                j++;
                out[i] = (byte) (f & 0xFF);
            }
            return out;
        }

        /**
         * 将十六进制字符转换成一个整数
         *
         * @param ch    十六进制char
         * @param index 十六进制字符在字符数组中的位置
         * @return 一个整数
         * @throws RuntimeException 当ch不是一个合法的十六进制字符时，抛出运行时异常
         */
        protected static int toDigit(char ch, int index) {
            int digit = Character.digit(ch, 16);
            if (digit == -1) {
                throw new RuntimeException("Illegal hexadecimal character " + ch + " at index " + index);
            }
            return digit;
        }

        /**
         * 数字字符串转ASCII码字符串
         *
         * @param content 字符串
         * @return ASCII字符串
         */
        public static String StringToAsciiString(String content) {
            StringBuilder result = new StringBuilder();
            int max = content.length();
            for (int i = 0; i < max; i++) {
                char c = content.charAt(i);
                String b = Integer.toHexString(c);
                result.append(b);
            }
            return result.toString();
        }

        /**
         * 十六进制转字符串
         *
         * @param hexString  十六进制字符串
         * @param encodeType 编码类型4：Unicode，2：普通编码
         * @return 字符串
         */
        public static String hexStringToString(String hexString, int encodeType) {
            StringBuilder result = new StringBuilder();
            int max = hexString.length() / encodeType;
            for (int i = 0; i < max; i++) {
                char c = (char) hexStringToAlgorism(hexString.substring(i * encodeType, (i + 1) * encodeType));
                result.append(c);
            }
            return result.toString();
        }

        /**
         * 十六进制字符串装十进制
         *
         * @param hex 十六进制字符串
         * @return 十进制数值
         */
        public static int hexStringToAlgorism(String hex) {
            hex = hex.toUpperCase();
            int max = hex.length();
            int result = 0;
            for (int i = max; i > 0; i--) {
                char c = hex.charAt(i - 1);
                int algorism;
                if (c >= '0' && c <= '9') {
                    algorism = c - '0';
                } else {
                    algorism = c - 55;
                }
                result += Math.pow(16, max - i) * algorism;
            }
            return result;
        }

        /**
         * 十六转二进制
         *
         * @param hex 十六进制字符串
         * @return 二进制字符串
         */
        public static String hexStringToBinary(String hex) {
            hex = hex.toUpperCase();
            StringBuilder result = new StringBuilder();
            int max = hex.length();
            for (int i = 0; i < max; i++) {
                char c = hex.charAt(i);
                switch (c) {
                    case '0':
                        result.append("0000");
                        break;
                    case '1':
                        result.append("0001");
                        break;
                    case '2':
                        result.append("0010");
                        break;
                    case '3':
                        result.append("0011");
                        break;
                    case '4':
                        result.append("0100");
                        break;
                    case '5':
                        result.append("0101");
                        break;
                    case '6':
                        result.append("0110");
                        break;
                    case '7':
                        result.append("0111");
                        break;
                    case '8':
                        result.append("1000");
                        break;
                    case '9':
                        result.append("1001");
                        break;
                    case 'A':
                        result.append("1010");
                        break;
                    case 'B':
                        result.append("1011");
                        break;
                    case 'C':
                        result.append("1100");
                        break;
                    case 'D':
                        result.append("1101");
                        break;
                    case 'E':
                        result.append("1110");
                        break;
                    case 'F':
                        result.append("1111");
                        break;
                    default:
                        System.out.println("hexStringToBinary无匹配项");
                        break;
                }
            }
            return result.toString();
        }

        /**
         * ASCII码字符串转数字字符串
         *
         * @param content ASCII字符串
         * @return 字符串
         */
        public static String AsciiStringToString(String content) {
            StringBuilder result = new StringBuilder();
            int length = content.length() / 2;
            for (int i = 0; i < length; i++) {
                String c = content.substring(i * 2, i * 2 + 2);
                int a = hexStringToAlgorism(c);
                char b = (char) a;
                String d = String.valueOf(b);
                result.append(d);
            }
            return result.toString();
        }

        /**
         * 将十进制转换为指定长度的十六进制字符串
         *
         * @param algorism  int 十进制数字
         * @param maxLength int 转换后的十六进制字符串长度
         * @return String 转换后的十六进制字符串
         */
        public static String algorismToHexString(int algorism, int maxLength) {
            String result;
            result = Integer.toHexString(algorism);

            if (result.length() % 2 == 1) {
                result = "0" + result;
            }
            return patchHexString(result.toUpperCase(), maxLength);
        }

        /**
         * 字节数组转为普通字符串（ASCII对应的字符）
         *
         * @param bytearray byte[]
         * @return String
         */
        public static String byteToString(byte[] bytearray) {
            StringBuilder result = new StringBuilder();
            char temp;

            int length = bytearray.length;
            for (byte b : bytearray) {
                temp = (char) b;
                result.append(temp);
            }
            return result.toString();
        }

        /**
         * 二进制字符串转十进制
         *
         * @param binary 二进制字符串
         * @return 十进制数值
         */
        public static int binaryToAlgorism(String binary) {
            int max = binary.length();
            int result = 0;
            for (int i = max; i > 0; i--) {
                char c = binary.charAt(i - 1);
                int algorism = c - '0';
                result += Math.pow(2, max - i) * algorism;
            }
            return result;
        }

        /**
         * 十进制转换为十六进制字符串
         *
         * @param algorism int 十进制的数字
         * @return String 对应的十六进制字符串
         */
        public static String algorismToHEXString(int algorism) {
            String result;
            result = Integer.toHexString(algorism);

            if (result.length() % 2 == 1) {
                result = "0" + result;

            }
            result = result.toUpperCase();

            return result;
        }

        /**
         * HEX字符串前补0，主要用于长度位数不足。
         *
         * @param str       String 需要补充长度的十六进制字符串
         * @param maxLength int 补充后十六进制字符串的长度
         * @return 补充结果
         */
        static public String patchHexString(String str, int maxLength) {
            StringBuilder temp = new StringBuilder();
            for (int i = 0; i < maxLength - str.length(); i++) {
                temp.insert(0, "0");
            }
            str = (temp + str).substring(0, maxLength);
            return str;
        }

        /**
         * 将一个字符串转换为int
         *
         * @param s          String 要转换的字符串
         * @param defaultInt int 如果出现异常,默认返回的数字
         * @param radix      int 要转换的字符串是什么进制的,如16 8 10.
         * @return int 转换后的数字
         */
        public static int parseToInt(String s, int defaultInt, int radix) {
            int i;
            try {
                i = Integer.parseInt(s, radix);
            } catch (NumberFormatException ex) {
                i = defaultInt;
            }
            return i;
        }

        /**
         * 将一个十进制形式的数字字符串转换为int
         *
         * @param s          String 要转换的字符串
         * @param defaultInt int 如果出现异常,默认返回的数字
         * @return int 转换后的数字
         */
        public static int parseToInt(String s, int defaultInt) {
            int i;
            try {
                i = Integer.parseInt(s);
            } catch (NumberFormatException ex) {
                i = defaultInt;
            }
            return i;
        }

        /**
         * 十六进制串转化为byte数组
         *
         * @return the array of byte
         */
        public static byte[] hexToByte(String hex) throws IllegalArgumentException {
            if (hex.length() % 2 != 0) {
                throw new IllegalArgumentException();
            }
            char[] arr = hex.toCharArray();
            byte[] b = new byte[hex.length() / 2];
            for (int i = 0, j = 0, l = hex.length(); i < l; i++, j++) {
                String swap = "" + arr[i++] + arr[i];
                int byteInt = Integer.parseInt(swap, 16) & 0xFF;
                b[j] = Integer.valueOf(byteInt).byteValue();
            }
            return b;
        }

        /**
         * 字节数组转换为十六进制字符串
         *
         * @param b byte[] 需要转换的字节数组
         * @return String 十六进制字符串
         */
        public static String byteToHex(byte[] b) {
            if (b == null) {
                throw new IllegalArgumentException("Argument b ( byte array ) is null! ");
            }
            StringBuilder hs = new StringBuilder();
            String stmp;
            for (byte value : b) {
                stmp = Integer.toHexString(value & 0xff);
                if (stmp.length() == 1) {
                    hs.append("0").append(stmp);
                } else {
                    hs.append(stmp);
                }
            }
            return hs.toString().toUpperCase();
        }

        public static byte[] subByte(byte[] input, int startIndex, int length) {
            byte[] bt = new byte[length];
            System.arraycopy(input, startIndex, bt, 0, length);
            return bt;
        }
    }
}
